Alternating-current arc-lamp.



No. 628,!09. Patented July 4, I899. v G. L. MOYER.

ALTERNATING CURRENT ARC LAMP.

(Application filed Apr. 25, 1899.) v (N M B 4 Sheets-Sheet l.

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No. 628,")9. Patented July 4, I899.

G. L. MOYER. ALTEBNATING CURRENT ARC LAMP.-

(Application filed Apr. 25, was.

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N0. 628,!09. Patented July 4, I899:

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ALTERNATING CURRENT ARC LAMP.

(Application filed Apr. 25, 1899.) (No Model.) 4 Sheets-Sheet 3.

No. 628,!09. Patented iuly 4, I899 G. L. MOYEB.

ALTERNATING CURRENT ABC LAMP.

(Application filed Apr. 25, 1899.) (N0 Modem 4 Sheets-Sheet 4,

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UNITED STATES PATENT OFFICE.

GILBERT L. MOYER, OF HARTFORD, CONNECTICUT, ASSIGNOR TO THE PERKINS ELECTRIC SWITCH MANUFACTURING COMPANY, OF SAME PLACE.

ALTERNATlNG-CURRENT ARC-LAM P.

SPECIFICATION forming part of Letters Patent No. 628,109, dated July 4, 1899.

Application file l April 25, 1899. Serial No. 714,407. (No model.)

To all whom it may concern:

Be it known that I, GILBERT L. MOYER, a citizen of the United States, residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Alternatin g-Current Arc-Lamps, of which the following is a specification.

The invention relates to an alternating-current arc-lamp, and while described in connection with an inclosed-arclamp it is applicable to an'open-arc lamp. I

The object of the invention is to construct an arc-lamp for alternating currents of electricity in which the carbons are so controlled that the arc will be struck without jump or rattle and will burn steadily and quietly.

In the lamp illustrated as embodying the invention whenever the current is turned on the upper carbon is first slightly separated from the lower carbon by a magnet that has insufficient power to lift the carbon for completing the arc and then is lifted enough to form a complete are by the first magnet assisted by a second, whereby the are Will be started slowly by a weak magnetic influence and after the carbons become heated and the resistance of the arc is increased will be completed by a strong magnetic influence.

Figure 1 of the accompanying drawings shows a side elevation of an alternating-current inclosed-arc lamp that embodies the invention, the shell and outer globe being omitted. Fig. 2 shows an enlarged plan of the inductive resistance employed with this lamp when used in multiple, one of the coils being omitted, so the shape of the core may be seen. Fig. 3 is an edge view of this inductive resistance with one coil removed. Fig. 4 is an enlarged section lookingdowu from the plane of the dotted line Aof Fig. 1, showing in plan the magnet-frame, the corelevers, and the frame-plate. Fig. 5 is an enlarged section looking down from the plane of the'line B of Fig. 1, showing in plan the clutch-blocks, the clutch-levers,and the cap for the inner globe. Fig. 6 is a side elevation of the cores, core-levers, clutch-blocks, and clutch-levers with the connecting parts and the cont-rolling means. Fig. 7 is a detail .view of a magnet-core, and Fig. 8 is a plan of the clutch-blocks and the clutchlevers.

In the multiple arc-lamp illustrated one of the circuit-wires is joined to the coils 1 on the cores 2, which are held by the frame 3. There are four cores and each is built of thin oblong iron plates with beveled ends that have notches 4. Each of these laminated cores is wound separately by machine and then fastened to the frame by studs 5, that extend through the ends of the frame and the notches in the ends of the plates. The frame, with the coils connected in series, is placedupon the supporting-post 6 of the lamp, Figs. 1, 2, and 3.

The magnet-coils 7 are held between the upper and lower magnet-plates 8, mounted upon the supporting-post. These coils are connected in series with the coils of the inductive resistance, Fig. 1.

A collar 9 is fastened on the post 6 between the inductive resistance and the feed-magnets, and pivoted to this collar upon opposite sides of the post are core-levers 10, Fig. 4:. Each of these levers at one end is connected by a spring-coupling 11 with an asbestos-covered core 12, and at the other end by a link 13 with the end of a clutch-lever 14:, Fig. 6.

The upper end of the clutch-block 15 on one side and the upper end of the clutchblock 16 on the other side of the carbon are pivotally connected with the forked end of one clutch-lever, and the lower ends of these blocks are pivotally connected with the forked end of the other clutch-lever. The lifting of the upper cl utch-lever, the lower clutch-lever remaining stationary, moves the block 15 transversely, so that it will push sidewise against the carbon that extends between the blocks, and the lifting of both the 01 utch-levers moves the blocks 15 and 16 toward each other, so they will grip the carbon between them, Fig. 6.

Extending outwardly from the fork of the upper clutch1ever are pins 17 arranged to engage with stop-plates 18, adjustably supported by rods 19, depending from the frameplates 20. WVhen the pins rest upon the stopplates, the downward movement of the clutchlevers causes both of the clutch-blocks to move away from the carbon that is between them, Figs. 1 and 5.

Dash-pots 21 are supported by the feedmagnet frame on opposite sides of the supporting-post, and in each of these is a piston 22, that has a loose valve-disk 23. These disks are so arranged that air may freely pass inwardly,allowing the pistons to drop quickly; but they restrict the flow of air outwardly, and thus prevent a rapid movement of the pistons, Fig. 6. One of these pistons is connected with an arm 24, fastened to one of the links 13, and the other piston is connected with an arm 25, fastened to the other-link. When the feed-magnets are not excited, the links and connected parts drop by gravity until the arms 24 and 25 rest upon the upper frame-plate 20 and the pins 17 rest upon the stop-plates 18. The arm 24 is attached lower down than the arm 25, so that the link with the arm 25 will drop lower than the link with the arm 24, and this causes the clutch-block 16 to be opened farther from the carbon than the clutch-block 15. As the link with the arm 25 drops lower than the other link, it is necessary that it move upwardly farther than the other link before the clutch-block 16 will engage and assist in lifting the carbon, Figs. 1 and 6.

The upper carbon 26 extends from its holder in the supporting-post, to which one of the circuit-wires is connected,between the clutchblocks and through the bushing 27 at the top of the cap 28 of. the inner globe 29, which parts are constructed and arranged in a common manner.

With this lamp one cored and one solid carbon are generally used, and when no current isflowing through the lamp the magnet-cores are free from influence and the links and levers drop until the arms 24 and 25 rest upon the frame-plate 20 and the pins 17 lie upon the stop-plates 18. The pins and stop-plates holding the clutchblocks from downward movement, the complete dropping of the links and levers opens the clutch-blocks and permits the upper carbon to settle down and make contact with the point of the lower carbon. As one link drops considerably farther than the other, owing to the different height of the arms 24 and 25, the clutch-block 16, connected with the link that drops the lowest, is opened Wider than the clutch-block 15, connected with the other link. When current is turned on and the feed-magnets are excited and through the attraction of the cores the links and clutch-levers are lifted, the clutch-block 15, that opens but little first, presses against the carbon and, pushingit sidewise, causes it to be bound between the clutch-block and the side of the bushing in the globe-cap. As this clutch-block binding the carbon in this manner rises the carbon is raised a little, so that the arc will be started and the points heated. The single magnet be ing too weak to separate the carbons sufficiently to complete the arc and the first lift being accomplished by only one clutch-block, with the consequent friction between the carbon and its supports, the arc is struck comparatively slowly and gently; but by the time that the arc is started the clutch-block 16, that is required to travel a greater distance than the block 15, comes into play, and then the carbon is gripped between .both of the clutch-blocks and subjected to the action of both feed-magnets, which together are sufficiently powerful to complete the carbon sepa ration and maintain the arc.

When held by both clutch-blocks, the friction between the upper carbon and the bushing is removed, so that carbon will respond to slight variations of volt-age and current due to the shifting of the arc and waste of the carbons.

There is no jumping of the carbon or rupturing of the are when the current is turned onto this lamp, for the arc is started by a magnetic pull that is not powerful enough to separate the carbons violently or widely. Nevertheless, with this mechanism the feed of the carbons is even, for the upper carbon is held by a very sensitive clutch, and the magnetic lift is sufficiently powerful when the arc is full.

In the construction shown the drawing of the are by onemagnet and maintaining it by two is accomplished by allowing one clutch part to open wider than the other, so that it will not act as soon as the other; but it is obvious that this may be accomplished by making one of the dash-pots stifier than the otherfor instance, by having a valve in the piston of the one that it is desired shall act first and not having a Valve in the piston of the other-or by making one dash-pot larger than the other, or one of the magnets may be stronger than the other, or, if desired, a slot, as represented by dotted lines at 30 in Fig. 6, could be made in one of the links, so that link would not act as quickly as the other link.

For a straight series lamp a common shuntcoil regulation would be employed in place of the inductive resistance shown with this multiple lamp.

I claim as my invention- 1. 'In combination with the supportingframe of an arc-lamp, a clutch havinga part arranged to open from a carbon a limited distance and havinga part arranged to open from the carbon a greater distance, magnets with cores for causing the clutch parts to close against the carbon, and connections between the clutch parts and the magnet-cores, substantially as specified.

2. In combination with the supportingframe of an arc-lamp, a clutch having parts arranged to open from and close against a carbon, alever connected with one clutch part and arranged to drop down for opening that clutch part, a lever connected with the other clutch part and arranged to drop down farther than the other lever for opening the clutch part with which it is connected, magnets with cores for causing the levers to be lifted, and connections between the levers and the magnet-cores, substantially as specified.

3. In combination with the supportingframe of an arc-lamp, a clutch having parts arranged to open from and close against a carbon, a lever connected with each clutch part, a link connected with each lever, one link being arranged to drop farther than the other link, a core connected with each link, and a magnet for each core, substantially as specified.

l. In combination with the supportingframe of an arc-lamp, a clutch having parts arranged to open and close against a carbon, a lever connected with each clutch part, a link connected with each lever, one link being arranged to drop farther than the other link, a piston connected with each link, a dash-pot for each piston, a core. connected with each link, and a magnet for each core, substantially as specified.

5. In combination with the supportingframe of an arc-lamp, a clutch having parts arranged to open from and close against a carbon, a clutch-lever connected with each clutch part, a link connected with each clutch-lever, one link being arranged to drop farther than the other link, a core-lever connected with each link, a core connected with each corelever, and a magnet for each core, substantially as specified.

6. In combination with the supportingframe of an arc-lamp, a clutch having parts arranged to open from and close against a carbon, a clutch-lever connected with each clutch part, a link connected with each clutch-lever, one link being arranged to drop farther than the other link, a dash-pot connected with each link, a core-lever connected with each link, a core connected with each core-lever, and a magnet for each core, substantially as specified.

7. In combination with the supportingframe of an arc-lamp, a clutch having parts arranged to open and close against a carbon, a clutch-lever connected with each clutch part, a link connected with each clutch-lever, one link being arranged to drop farther than the other link, a core-lever connected with each link, a spring-coupling connected with each core-lever, a core connected with each coupling, and a magnet for each core, sub stantially as specified.

8. In combination with the supporting frame of an arc-lamp, a clutch having two parts arranged to open from and close against a carbon, a lever connected with each of the clutch parts, pins extending outwardly from one of the levers, a stop-plate arranged in the path of each pin, a link connected with each of the levers, one link being arranged to drop farther than the other, a core connected with each of the links, and a magnet for each of the cores, substantially as specified.

GILBERT L. MOYER.

Witnesses HARRY R. WILLIAMS, H. H. WILLIAMS. 

